Climate refugia along Lake Superior’s shores: Disjunct arctic-alpine plants rely on cool shoreline temperatures but are unlikely to persist under climate warming

Climate refugia can serve as remnant habitat or stepping stones for species dispersal under climate warming. The largest freshwater lake by surface area, Lake Superior, USA and Canada, serves as a model system for understanding cooling-mediated local refugia, as its cool water temperatures and wave action have maintained shoreline habitats suitable for southern disjunct populations of arctic-alpine plants since deglaciation. Here we seek to explain spatial patterns and environmental drivers of arctic-alpine plant refugia along Lake Superior’s shores, and assess future risk to refugia under moderate (+3.5 °C) and warmest (+5.7 °C) climate warming scenarios. First, we examined how the interactive effects of summer surface water temperatures and wind affected onshore temperatures, resulting in areas of cooler refugia. Second, we developed an ecological niche model for presence of disjunct arctic-alpine refugia (pooling 1253 occurrences from 58 species) along the lake’s shoreline. Third, we..., , , # Title of Dataset: Climate refugia along Lake Superior’s shores: disjunct arctic-alpine plants rely on cool shoreline temperatures but are unlikely to persist under climate warming

---

This dataset contains species occurrence records for 59 disjunct arctic-alpine species at Lake Superior. Hillman_species_occurrences_raw_data.csv contains location data for all occurrence records, as well as spatial data for elevation, bedrock type, depth of water within 10 km of shore, log of Euclidean distance from shore, and land surface temperature from MODIS/Terra satellite.
Data were used to build species distribution models for all species considered disjunct and 21 most common disjunct species.

Variable list:

Point - Number of points assigned to either a species occurrence or a randomly generated pseudoabsence point

pres_abs - Whether species is present or not (1 for present, 0 for absent)

Species - Species that is present at that location

Common name - Common name for species present at t...

气候避难所可在气候变暖背景下，作为物种存续的残留栖息地或物种扩散的踏脚石。作为全球表面积最大的淡水湖，美加共管的苏必利尔湖（Lake Superior）是探究冷源介导的本土气候避难所的模式系统：自冰期消融以来，其低温水体与波浪作用始终维持着适宜北极-高山植物（arctic-alpine plants）南部隔离种群生存的岸线栖息地。
本研究旨在阐明苏必利尔湖岸线北极-高山植物避难所的空间格局与环境驱动因子，并评估在中度（升温3.5℃）与极端（升温5.7℃）气候变暖情景下，避难所面临的未来风险。其一，我们探究了夏季表层水温与风速的交互作用如何影响岸区气温，进而形成低温避难所区域；其二，我们针对该湖岸线的隔离型北极-高山植物避难所（整合了58个物种共计1253条出现记录）构建了生态位模型；其三，本研究……
# 数据集标题：苏必利尔湖岸线气候避难所：隔离型北极-高山植物依赖低温岸线生境，但难以在气候变暖下持续存续

本数据集包含苏必利尔湖境内59种隔离型北极-高山植物的物种出现记录。其中，Hillman_species_occurrences_raw_data.csv 包含所有出现记录的位置数据，以及海拔、基岩类型、岸线10公里范围内水深、岸线欧氏距离对数、MODIS/Terra卫星获取的地表温度等空间数据。
本数据集被用于构建所有入选隔离物种以及21种最常见隔离物种的物种分布模型。

变量列表：
Point：分配给物种出现点或随机生成的伪缺失点的点数
pres_abs：物种存在与否的标记（1代表存在，0代表缺失）
Species：该点位出现的物种
Common name：该点位出现物种的通用名称（原文未完成）